im really worried my crank bearings are going bad, since the bike is about 11 years old and i dout they have been replaced, what exactly am i looking for when looking at the crank? the cylinder is off atm. how can i measure it or test it? if they are bad, do i need any special tools like a press to get the crank out of the case? i think the bearings under the connecting rod are bad but im not completely sure.